Tube socket



F. M, E936. B. HENSEL ET AL TUBE SOCKET `Filed. July 28, 1934 INVENTORS EP/W-/RD HEMSL, KURT HESS Patented Feb. 11, 1936 UNITED STATES PATENT OFFICE TUBE SOCKET Application July 28, 1934, Serial No. 737,326 In Germany July 31, 1933 3 Claims.

It is an object of the present invention to provide a novel form of base for a glass tube in which electrical parts are mounted and more particularly for a radio vacuum tube containing several metallic elements.

A further object is to provide an insulating base for a vacuum tube, the base being composed of two separate parts which may be easily secured together by screws or other known securing means.

A still further object is to provide a two part base structure for a radio Vacuum tube in which the tube itself is secured to a main base portion and the pins which serve to connect the electrical parts within the tube to desired circuits are secured to a second or auxiliary base portion which in turn is secured to the main base portion.

Other objects of the invention will become apparent to those skilled in the art as the description thereof proceeds. For a better understanding of the invention, however, reference is made to the following description taken in connection with the attached drawing, in which:

Figure 1 shows a partial cross section of the tube base seated in the main base portion;

Figure 2 shows a sectional view of the auxiliary base portion and connecting pins; and

Figure 3 shows a section through the auxiliary base on line 3-3 of Figure 2.

While the socket to be described is particularly adapted for Braun tubes, it may be used for any other known tubes such as radio Vacuum tubes. A hollow main base 3 formed of insulation material is formed of a wide cylindrical upper portion H and a lower thicker cylindrical portion W a ledge 4 being formed where the two portions meet. In the lower end of W a plurality of tapped holes L are formed. These serve to sey cure the insulating plate or ring P or auxiliary base portion by screws 8 to the end of the main base portion 3 ring P having secured thereto the metal base pins B to each of which is secured a soldering lug or terminal S. When assembled the pins B project within base 3 and by making pins B extend above the plate P an amount less than the height of lower portion W, the lower end 5 of the press l of the tube G will rest on and be supported by ledge or shoulder 4 and be out of contact with the pins B. The lead in wires 6 pass through the press I of the tube in the usual manner to the usual tube elements such as cathode and plate etc. (not shown).

In assembling the unit, the glass tube body G is rst cemented to the base portion 3 Without regard to the position of the lead in wires 6. Then 5 the ring P with its pins B is screwed to the lower end of W and each lead-in 6 soldered to the proper tab S, the tabs S being accessible and Visible to easily permit the soldering operation through the central hole 'I in ring P.

Having described our invention, what we claim as novel and desire to secure by Letters Patent is:

1. A socket adapted to receive an electronic tube, comprising an upper hollow insulating portion, a lowerflat circular portion having the same diameter as sa-id upper portion, a plurality of metallic pins secured to said lower portion and arranged to project within said upper portion and screw means passing through said lower portion and into said upper portion for securing said upper and lower portions together.

2. In combination, a main socket member provided with an internal ledge portion and a plurality of threaded holes at its lower end, a glass bulb having its lower end designed to engage and be supported by said ledge portion, a, thin insulating base portion provided with a plurality of apertures in alignment with said threaded holes,

a plurality of terminal members secured to said thin base portion and a plurality of screws passing through said apertures into said threaded holes for securing said base portion to said main socket member.

3. In combination, a hollow cylindrical insulation member formed with a projecting ledge at a predetermined height from its base, a glass tube formed with its lower end arranged to engage said ledge, an auxiliary insulation base provided with a plurality of pins extending into said rst named member by a distance less than the height of said ledge each of said pins being provided with a groove, thin terminal members entering said grooves and the lower ends of said pins being turned over against the lower face of said auxiliary base portion to thereby retain said pins in position and means for securing said auxiliary base to said first named member. 

